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Abstract

The aim of this study was to investigate the reliability and validity of the Norwegian Kidscreen-27 questionnaire, a measure of generic health-related quality of life, in 10 year-old children. The Kidscreen-27 consists of five domains and was validated in a sample of 56 school children (29 boys). The children completed the questionnaire at three different time points during two consecutive school days. For convergent validity, the study was powered to detect a statistically significant correlation coefficient of 0.4. Cronbach's alpha values ranged from 0.73 to 0.83. Floor effects were all zero and ceiling effects ranged from 1.7% to 23.7%. Intraclass correlation values over time ranged from 0.71 to 0.81. However, some individual variability over time occurred and was illustrated by Bland Altman plots. The domains of physical well-being, psychological well-being and autonomy & parents improved over time (Ps < 0.05), while social support and school environment domains did not. We assessed convergent validity using general life satisfaction scores obtained by administering the Cantrils Ladder. All the Kidscreen-27 domains were significantly associated with general life satisfaction (Spearman rank correlations ranged from 0.29 to 0.59, Ps < 0.05). In conclusion, the Norwegian version of Kidscreen-27 has good reliability and validity.

Author Comment

This is a submission to PeerJ for review.

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

John Roger Andersen conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Gerd Karin Natvig conceived and designed the experiments, wrote the paper, reviewed drafts of the paper.

Kristin Haraldstad conceived and designed the experiments, wrote the paper, reviewed drafts of the paper.

Turid Skrede conceived and designed the experiments, performed the experiments, wrote the paper, reviewed drafts of the paper.

Eivind Aadland conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, reviewed drafts of the paper.

Geir Kåre Resaland conceived and designed the experiments, performed the experiments, wrote the paper, reviewed drafts of the paper.

Human Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

Written informed consent for publication of their clinical details was obtained from the parents/guardians/relatives. The study was approved by the regional ethical research committee (2012/1089).

Funding

The study received a grant from the Research Council of Norway (221047/F40). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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